Nix expression to install and configure doom-emacs

2025-09-18 16:06:59 -05:00 · 2019-10-23 14:22:46 +02:00
parent e238f95927
commit c6ae77570d
6 changed files with 274 additions and 1 deletions
--- a/default.nix
+++ b/default.nix
@@ -0,0 +1,145 @@
+{ # The files would be going to ~/.config/doom (~/.doom.d)
+  doomPrivateDir
+  # Package set to install emacs and dependent packages from
+, emacsPackages
+, lib
+, pkgs
+, stdenv
+, buildEnv
+, makeWrapper
+, runCommand
+, fetchFromGitHub
+, substituteAll
+, writeScriptBin
+, writeTextDir }:
+
+let
+  # Packages we need to get the default doom configuration run
+  overrides = self: super: {
+    evil-escape = super.evil-escape.overrideAttrs (esuper: {
+      patches = [ ./evil-escape.patch ];
+    });
+    org-yt = self.trivialBuild rec {
+      pname = "org-yt";
+      version = "1";
+      recipe = null;
+      ename = pname;
+      src = fetchFromGitHub {
+        owner = "TobiasZawada";
+        repo = "org-yt";
+        rev = "40cc1ac76d741055cbefa13860d9f070a7ade001";
+        sha256 = "0jsm3azb7lwikvc53z4p91av8qvda9s15wij153spkgjp83kld3p";
+      };
+    };
+  };
+
+  # Stage 1: prepare source for byte-compilation
+  doomSrc = stdenv.mkDerivation {
+    name = "doom-src";
+    src = fetchFromGitHub {
+      owner = "hlissner";
+      repo = "doom-emacs";
+      rev = "22ae9cca15f5aa9215cf0ec2c7b0b78d64deddc0";
+      sha256 = "0nya6qf2v0snd4zskxxradqdpiylpx3lxfrfi7xs04yb39ma99pn";
+    };
+    phases = ["unpackPhase" "patchPhase" "installPhase"];
+    patches = [
+      (substituteAll {
+        src = ./fix-paths-pre.patch;
+        private = builtins.toString doomPrivateDir;
+      })
+    ];
+    installPhase = ''
+      mkdir -p $out
+      cp -r * $out
+    '';
+  };
+
+  # Stage 2:: install dependencies and byte-compile prepared source
+  doomLocal =
+    let
+      straight-env = pkgs.callPackage (fetchFromGitHub {
+        owner = "vlaci";
+        repo = "nix-straight.el";
+        rev = "v1.0";
+        sha256 = "038dss49bfvpj15psh5pr9jyavivninl0rzga9cn8qyc4g2cj5i0";
+      }) {
+        emacsPackages = emacsPackages.overrideScope' overrides;
+        emacsLoadFiles = [ ./advice.el ];
+        emacsArgs = [
+          "install"
+          "--no-fonts"
+          "--no-env"
+        ];
+
+      # Need to reference a store path here, as byte-compilation will bake-in
+      # absolute path to source files.
+        emacsInitFile = "${doomSrc}/bin/doom";
+      };
+
+      packages = straight-env.packageList (super: {
+        phases = [ "installPhase" ];
+        preInstall = ''
+          export DOOMDIR=$(mktemp -d)
+          export DOOMLOCALDIR=$DOOMDIR/local/
+          cp ${doomPrivateDir}/* $DOOMDIR
+        '';
+      });
+
+      # I don't know why but byte-compilation somehow triggers Emacs to look for
+      # the git executable. It does not seem to be executed though...
+      git = writeScriptBin "git" ''
+        >&2 echo Executing git is not allowed; command line: "$@"
+      '';
+    in (straight-env.emacsEnv {
+      inherit packages;
+      straightDir = "$DOOMLOCALDIR/straight";
+    }).overrideAttrs (super: {
+      phases = [ "installPhase" ];
+      buildInputs = super.buildInputs ++ [ git ];
+      preInstall = ''
+          export DOOMDIR=$(mktemp -d)
+          export DOOMLOCALDIR=$out/
+          mkdir -p $DOOMDIR
+          cp ${doomPrivateDir}/* $DOOMDIR
+      '';
+    });
+
+  # Stage 3: do additional fixups to refer compiled files in the store
+  # and additional files in the users' home
+  doom-emacs = stdenv.mkDerivation rec {
+    name = "doom-emacs";
+    src = doomSrc;
+    patches = [
+      (substituteAll {
+        src = ./fix-paths.patch;
+        local = doomLocal;
+      })
+    ];
+    buildPhase = ":";
+    installPhase = ''
+      mkdir -p $out
+      cp -r * $out
+    '';
+  };
+
+  # Stage 4: catch-all wrapper capable to run doom-emacs even
+  # without installing ~/.emacs.d
+  emacs = (emacsPackages.emacsWithPackages (epkgs: [
+    (writeTextDir "share/emacs/site-lisp/default.el" ''
+        (message "doom-emacs is not placed in `doom-private-dir',
+        loading from `site-lisp'")
+        (when (> emacs-major-version 26)
+              (load "${doom-emacs}/early-init.el"))
+        (load "${doom-emacs}/init.el")
+      '')
+  ])).overrideAttrs (super: {
+    outputs = [ "out" "emacsd" ];
+    buildInputs = [ doom-emacs ];
+    installPhase = super.installPhase + ''
+      echo ln -snf ${doom-emacs} $emacsd
+      ln -snf ${doom-emacs} $emacsd
+    '';
+  });
+
+in emacs